From: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com> This patch series modifies the existing IOMMU and Perf drivers to support systems with multiple IOMMUs by allocating an amd_iommu PMU per IOMMU instance. This allows users to specify performance events and filters separately for each IOMMU.
This has been tested on the new family17h-based server w/ multiple IOMMUs. Git branch containing this patch series is available here: https://github.com/ssuthiku/linux.git perf-iommu-v8 Changes from V7 (https://lkml.org/lkml/2017/1/9/917) * Re-order patches to clean up first before introducing new stuff. * Always use amd_iommu_get_num_iommus() to access amd_iommus_present variable now. * Fix Perf IOMMU sysfs attributes initialization. * Miscellaneous clean up Changes from V6 (https://lkml.org/lkml/2016/12/23/134) * Renamed function parameters from devid to idx (per Joerg). * Removed unnecessary function declarations from amd_iommu_proto.h (per Joerg). Changes from V5 (https://lkml.org/lkml/2016/2/23/370) * Rebased onto v4.9. * Remove the patch which consolidates function delclarations since we have not yet agreed on the appropriate place for the new header file. Thanks, Suravee Suravee Suthikulpanit (9): perf/amd/iommu: Declare pr_fmt and remove unnecessary pr_debug perf/amd/iommu: Clean up perf_iommu_enable_event perf/amd/iommu: Misc fix up perf_iommu_read iommu/amd: Introduce amd_iommu_get_num_iommus() perf/amd/iommu: Modify functions to query max banks and counters perf/amd/iommu: Modify amd_iommu_pc_get_set_reg_val() API to allow specifying IOMMU index perf/amd/iommu: Check return value when set and get counter value perf/amd/iommu: Fix sysfs perf attribute groups perf/amd/iommu: Enable support for multiple IOMMUs arch/x86/events/amd/iommu.c | 280 ++++++++++++++++++++-------------------- arch/x86/events/amd/iommu.h | 16 ++- drivers/iommu/amd_iommu.c | 6 +- drivers/iommu/amd_iommu_init.c | 100 +++++++++----- drivers/iommu/amd_iommu_proto.h | 8 +- drivers/iommu/amd_iommu_types.h | 3 - 6 files changed, 217 insertions(+), 196 deletions(-) -- 1.8.3.1